Chimney cap base



FIG. 1 is a front view of a chimney cap base in accordance with my design, the undisclosed rear, left and right side are identical;

FIG. 2 is a bottom end view of the chimney cap base of FIG. 1; and,

FIG. 3 is a top end view of the chimney cap base of FIG. 1.

The exemplary embodiment illustrated is symmetrical about the elongated axis thereof, such that the rear view, left side view and right side view are substantially identical to the front view of FIG. 1. 

The ornamental design for a chimney cap base, as shown and described. 